CN110793033A - Biomass fuel slurry steam injection boiler rotational flow stable combustion burner - Google Patents
Biomass fuel slurry steam injection boiler rotational flow stable combustion burner Download PDFInfo
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- CN110793033A CN110793033A CN201810864925.9A CN201810864925A CN110793033A CN 110793033 A CN110793033 A CN 110793033A CN 201810864925 A CN201810864925 A CN 201810864925A CN 110793033 A CN110793033 A CN 110793033A
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- secondary air
- air pipe
- biomass fuel
- fuel slurry
- cyclone
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- 239000000446 fuel Substances 0.000 title claims abstract description 77
- 239000002028 Biomass Substances 0.000 title claims abstract description 74
- 239000002002 slurry Substances 0.000 title claims abstract description 70
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 48
- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 230000008859 change Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
- F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2204/00—Burners adapted for simultaneous or alternative combustion having more than one fuel supply
- F23D2204/10—Burners adapted for simultaneous or alternative combustion having more than one fuel supply gaseous and liquid fuel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A biomass fuel slurry steam injection boiler rotational flow stable combustion burner comprises a biomass fuel slurry gun sleeve, a primary air pipe and an inner secondary air pipe which are sequentially and concentrically sleeved from inside to outside, wherein the nozzle end of the primary air pipe is outwards expanded to be horn-shaped, and the inner diameter of the middle of the inner secondary air pipe is smaller than the inner diameters of two ends, so that the nozzle of the inner secondary air pipe is horn-shaped; a primary air cyclone is arranged between the outer wall of the nozzle end of the sleeve of the biomass fuel slurry gun and the inner wall of the nozzle end of the primary air pipe, outer secondary air pipes are uniformly distributed outside the inner secondary air pipe, a gap is formed between the outer secondary air pipes and the inner secondary air pipes, a material injection layer is poured in the gap, and an inner secondary air cyclone is arranged between the inner wall of the inner secondary air pipe and the outer wall of the primary air pipe; a high-energy igniter sleeve and a gas gun sleeve are arranged between the inner wall of the primary air pipe and the biomass fuel slurry gun sleeve; a connecting port is formed on the side wall of the primary air pipe; the secondary air entering from the inner secondary air pipe and the outer secondary air pipe enters from the secondary air door. And the combustion instability in the biomass fuel slurry combustion process is reduced.
Description
Technical Field
The invention relates to a combustor, in particular to a rotational flow stable combustion combustor of a biomass fuel slurry steam injection boiler.
Background
The conventional gas steam injection boiler is adopted for heavy oil exploitation in oil fields in China, and with the influence of two adverse factors of limited natural gas consumption and price increase, the conventional gas steam injection boiler is remanufactured and upgraded to a biomass fuel slurry steam injection boiler, and one of the options of realizing fuel transformation by replacing gas with biomass is adopted. The coal reserves in China are rich, the coal types are complete, the development and application of the biomass fuel slurry technology meet the national policy of replacing oil with coal, and the method is an important content for popularizing the clean coal technology. The biomass fuel slurry as a substitute of petroleum fuel has the advantages of low price, low pollution, mature technology and the like, but compared with a gas boiler, the problem of poor combustion stability in the combustion process of the biomass fuel slurry is a key to be solved urgently, and due to the defect of the structure of the existing combustor, the combustion stability of the existing biomass fuel slurry is generally poor. How to ensure that biomass fuel slurry is stably ignited in the existing steam injection boiler so as to reach the level equivalent to that of the original fuel gas steam injection boiler is a problem which needs to be solved urgently by a low-nitrogen burner of the biomass fuel slurry steam injection boiler.
Disclosure of Invention
In order to solve the above problems, the present invention provides the following solutions:
a biomass fuel slurry steam injection boiler rotational flow stable combustion burner comprises a biomass fuel slurry gun sleeve, a primary air pipe and an inner secondary air pipe which are sequentially and concentrically sleeved from inside to outside, wherein the nozzle end of the primary air pipe is outwards expanded to be horn-shaped, and the inner diameter of the middle of the inner secondary air pipe is smaller than the inner diameters of two ends, so that the nozzle of the inner secondary air pipe is horn-shaped; a primary air cyclone is arranged between the outer wall of the nozzle end of the sleeve of the biomass fuel slurry gun and the inner wall of the nozzle end of the primary air pipe, outer secondary air pipes are uniformly distributed outside the inner secondary air pipe, a gap is formed between the outer secondary air pipes and the inner secondary air pipes, a material injection layer is poured in the gap, and an inner secondary air cyclone is arranged between the inner wall of the inner secondary air pipe and the outer wall of the primary air pipe; a high-energy igniter sleeve and a gas gun sleeve are also arranged between the inner wall of the primary air pipe and the biomass fuel slurry gun sleeve; a connecting port is formed in the side wall of the primary air pipe, and primary air enters the primary air pipe from the connecting port; the secondary air entering from the inner secondary air pipe and the outer secondary air pipe enters from the secondary air door.
Furthermore, the primary air pipe nozzle is positioned in the inner secondary air pipe, and the radial distance between the primary air pipe nozzle and the inner secondary air pipe nozzle is 40 mm.
Furthermore, the position of the nozzle of the outer secondary air pipe deviates from the central axis by an angle of 10 degrees.
Furthermore, the angle formed by the inner wall of the primary air pipe nozzle and the central shaft is larger than the angle formed by the inner wall of the inner secondary air pipe nozzle and the central shaft.
Furthermore, the primary air cyclone adjusts the air volume through a primary air door adjusting device to change the cyclone strength, the primary air door adjusting device comprises a primary air door and a primary rotating shaft, the primary air door blocks the connecting port, and the primary rotating shaft controls the rotating angle of the primary air door to change the area of the air door blocking connecting port; the secondary air cyclone in the secondary air adjusts the cyclone strength through the cyclone strength adjusting device, and the cyclone strength adjusting device changes the cyclone strength through changing the angle of the inner blade of the inner secondary air cyclone.
Furthermore, the opening angle of the secondary air door is controlled by the rotating shaft, so that the air quantity of the secondary air is controlled.
The use method of the rotational flow stable combustion burner suitable for the biomass fuel slurry steam injection boiler comprises the following steps:
1. introducing air into the rotational flow stable combustion burner of the biomass fuel slurry steam injection boiler;
2. introducing biomass fuel slurry into a biomass fuel slurry gun sleeve, and simultaneously starting a high-energy igniter sleeve and a gas gun sleeve to burn the biomass fuel slurry;
3. and adjusting the primary air door adjusting device, the secondary air door adjusting device and the rotational flow strength adjusting device according to the combustion condition of the biomass fuel slurry.
The invention has the beneficial effects that:
1. the biomass fuel slurry is used as fuel to replace the traditional natural gas, so that the biomass fuel slurry has low price and more stable combustion, and can improve the operating economy of the steam injection boiler.
2. The invention divides the total air quantity needed by the biomass fuel slurry burner into a plurality of strands by the primary air pipe, the inner secondary air pipe and the outer secondary air pipe, and leaves reasonable gaps among the strands of air, thereby effectively controlling the mixing of the strands of air and the biomass fuel slurry and greatly reducing the stable combustion emission on the premise of ensuring the combustion efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a nozzle of the present invention.
Reference numerals: 1, biomass fuel slurry gun sleeve; 2, a secondary air pipe; 3, inner secondary air pipe; 4, an outer secondary air pipe; 5, a secondary air cyclone; 6, an inner secondary air cyclone; 7, a rotational flow strength adjusting device; 8-secondary damper adjustment; 9, a secondary air door adjusting device; 10, injecting a material layer; 11, high-energy igniter sleeve; 12, a gas gun sleeve; 13: a secondary air door; and 14, connecting ports.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Example 1: as shown in figures 1-2 of the drawings,
the utility model provides a biomass fuel thick liquid steam injection boiler whirl is steady burning combustor, includes that from interior to exterior in proper order the biomass fuel thick liquid rifle sleeve pipe 1, primary air pipe 2, interior secondary tuber pipe 3 of establishing with one heart cover, the 2 spout ends of primary air pipe expand outward and be the loudspeaker form, primary air pipe 1 spout is located interior secondary air pipe 3, and the radial distance between 2 spouts of primary air pipe and 3 spouts of interior secondary air pipe is 40 mm. The middle inner diameter of the inner secondary air pipe 3 is smaller than the inner diameters of the two ends, so that the nozzle of the inner secondary air pipe 3 is horn-shaped; the angle formed by the inner wall of the primary air pipe 2 nozzle and the central shaft is larger than the angle formed by the inner wall of the inner secondary air pipe 3 nozzle and the central shaft. Outer secondary air pipes 4 are uniformly distributed outside the inner secondary air pipe 3, the spout positions of the outer secondary air pipes 4 deviate from the central shaft by an angle of 10 degrees, a gap is formed between the outer secondary air pipes 4 and the inner secondary air pipe 3, and a material injection layer 10 is poured in the gap to prevent the inner secondary air and the outer secondary air from being mixed too early; a primary air channel is formed between the side wall of the biomass fuel slurry gun sleeve 1 and the side wall of the primary air pipe 2, an inner secondary air channel is formed between the side wall of the primary air pipe 2 and the side wall of the inner secondary air pipe 3, an outer secondary air channel is formed in the outer secondary air pipe 4, and the inner secondary channel and the outer secondary channel are collectively called as a secondary air channel; a connecting port 14 is formed in the side wall of the primary air pipe 2, the primary air pipe is communicated with the secondary air pipe through the connecting port 14, a primary air cyclone 5 is arranged between the outer wall of the nozzle end of the biomass fuel slurry gun sleeve 1 and the inner wall of the nozzle end of the primary air pipe 3, the aperture of the connecting port 14 is changed to perform primary air volume adjustment by rotating the angle of an air door in a primary air adjusting device 8, and therefore the cyclone strength of the primary air cyclone 5 is adjusted; the secondary air enters the secondary air duct from the secondary air door 13, and the secondary air door 13 changes the opening thereof through the secondary air door adjusting device 9 to adjust the secondary air quantity; an inner secondary air cyclone 6 is arranged between the inner wall of the inner secondary air pipe 3 and the outer wall of the primary air pipe 2, the inner secondary air cyclone 6 adjusts the rotational flow strength through a rotational flow strength adjusting device 7, and the rotational flow strength adjusting device 7 adjusts the flame length through changing the angular adjustment rotational flow strength of the rotational flow blades in the inner secondary cyclone 6, so that the combustion efficiency is ensured. A high-energy igniter sleeve 11 and a gas gun sleeve 12 are further arranged between the inner wall of the primary air pipe 2 and the biomass fuel slurry gun sleeve 1 and used for arranging a high-energy igniter and a gas gun and supplying biomass fuel slurry for ignition. The type of the outer secondary air pipe 4 is direct current, so that premature mixing of the outer secondary air and the biomass fuel slurry can be prevented; the primary air pipe 2 nozzle, the inner secondary air pipe 3 nozzle and the outer secondary air pipe 4 nozzle are designed into flaring shapes, the flaring angles are different, and the flaring angles of the primary air pipe 2 nozzle are larger than those of the inner secondary air pipe 3 nozzle and the outer secondary air pipe 4 nozzle, so that the mixing and flame length of each layer of air can be reasonably controlled.
The use method of the rotational flow stable combustion burner suitable for the biomass fuel slurry steam injection boiler comprises the following steps:
1. introducing air into the rotational flow stable combustion burner of the biomass fuel slurry steam injection boiler;
2. introducing biomass fuel slurry into a biomass fuel slurry gun sleeve 1, and simultaneously starting a high-energy igniter sleeve 11 and a gas gun sleeve 12 to combust the biomass fuel slurry;
3. and adjusting the primary air door adjusting device 8, the secondary air door adjusting device 9 and the rotational flow strength adjusting device 6 according to the combustion condition of the biomass fuel slurry.
The air quantity required by the fire ignition and pre-combustion of the biomass fuel slurry sprayed from the combustor is divided into three parts, including primary cyclone air, secondary air in the cyclone air and secondary air outside the direct current. The radial distance between the primary air pipe 2 spout and the inner secondary air pipe 3 spout is 40mm, and the angle of the outer secondary air pipe 4 spout deviating from the central axis is 10 degrees. The primary air pipe 2 nozzle and the inner secondary air pipe 3 nozzle are annular. Therefore, reasonable gaps are reserved among all the air strands, the mixing of all the air strands and biomass fuel slurry is effectively controlled, and the stable combustion emission is greatly reduced on the premise of ensuring the combustion efficiency.
After the biomass fuel slurry enters the hearth, the biomass fuel slurry sequentially passes through three parts, namely: a pre-combustion zone, a stable combustion zone and a burnout zone. The total air quantity required by the combustion of the biomass fuel slurry is divided into three parts: the biomass fuel slurry is ejected from a burner to achieve the air quantity required by ignition and pre-combustion, the air quantity required by stable combustion of the biomass fuel slurry in a furnace chamber and the SOFA air of a burnout area (the air supplied by the stable combustion area is basically consumed, the residual air needs to be supplemented, and the air needs to be separated from the main burner by a certain distance, so that the air is called as 'separated over-fire air', namely 'SOFA'), and the air grading air distribution design can play two roles: firstly, the total oxygen amount in the early combustion stage of the ignition and pre-combustion zone is in the optimal oxygen concentration (< 3%), and the inhibition of the initial instability of combustion is realized; and secondly, timely supplementing oxygen in the middle combustion period of the biomass fuel slurry, and ensuring that the combustion rate is not influenced by air staged combustion. The primary air door adjusting device 8 and the secondary air door adjusting device 9 adjust the air volume of each strand to meet the requirement of biomass fuel slurry combustion. The principle that the primary air door and the secondary air door realize air volume regulation is the same, and the opening degree of the air door is changed by rotating along the shaft through the shaft arranged in the air channel by using the circular air door, so that the air volume regulation is realized.
Through the measures, the mixing of each air and the biomass fuel slurry in the low-nitrogen combustor is effectively controlled, the whole combustion process of the biomass fuel slurry is ensured to be carried out under the optimal oxygen concentration (< 3%), and the stable combustion emission is greatly reduced on the premise of ensuring the combustion efficiency.
The invention has the advantages that: the stable-combustion combustor of the biomass fuel slurry steam injection boiler adopts the biomass fuel slurry as fuel, replaces expensive natural gas, can realize stable-combustion discharge, effectively realizes the gas-substituted clean combustion of the biomass fuel slurry and energy conservation and emission reduction, improves the operation economy of the steam injection boiler, and has good application prospect for the exploitation of thick oil in an oil field.
Finally, it should be noted that the above-mentioned list is only a specific embodiment of the present invention. It is obvious that the present invention is not limited to the above embodiments, but many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (7)
1. The utility model provides a biomass fuel thick liquid steam injection boiler whirl is steady burning combustor which characterized in that: the biomass fuel slurry gun comprises a biomass fuel slurry gun sleeve, a primary air pipe and an inner secondary air pipe which are sequentially and concentrically sleeved from inside to outside, wherein the nozzle end of the primary air pipe is flared, and the inner diameter of the middle of the inner secondary air pipe is smaller than the inner diameters of two ends, so that the nozzle of the inner secondary air pipe is flared; a primary air cyclone is arranged between the outer wall of the nozzle end of the sleeve of the biomass fuel slurry gun and the inner wall of the nozzle end of the primary air pipe, outer secondary air pipes are uniformly distributed outside the inner secondary air pipe, a gap is formed between the outer secondary air pipes and the inner secondary air pipes, a material injection layer is poured in the gap, and an inner secondary air cyclone is arranged between the inner wall of the inner secondary air pipe and the outer wall of the primary air pipe; a high-energy igniter sleeve and a gas gun sleeve are also arranged between the inner wall of the primary air pipe and the biomass fuel slurry gun sleeve; a connecting port is formed in the side wall of the primary air pipe, and primary air enters the primary air pipe from the connecting port; the secondary air entering from the inner secondary air pipe and the outer secondary air pipe enters from the secondary air door.
2. The biomass fuel slurry steam injection boiler cyclone stable-combustion burner as claimed in claim 1, characterized in that: the primary air pipe nozzle is positioned in the inner secondary air pipe, and the radial distance between the primary air pipe nozzle and the inner secondary air pipe nozzle is 40 mm.
3. A biomass fuel slurry steam injection boiler cyclone burner as in claim 1, wherein: the position of the outer secondary air pipe nozzle deviates from the central axis by an angle of 10 degrees.
4. The biomass fuel slurry steam injection boiler cyclone stable-combustion burner as claimed in claim 1, characterized in that: the angle formed by the inner wall of the primary air pipe nozzle and the central shaft is larger than the angle formed by the inner wall of the inner secondary air pipe nozzle and the central shaft.
5. The biomass fuel slurry steam injection boiler cyclone stable-combustion burner as claimed in claim 1, characterized in that: the primary air cyclone device adjusts the air volume through a primary air door adjusting device to change the cyclone strength, the primary air door adjusting device comprises a primary air door and a primary rotating shaft, the primary air door blocks the connecting port, and the primary rotating shaft controls the rotating angle of the primary air door to change the area of the air door blocking connecting port; the secondary air cyclone in the secondary air adjusts the cyclone strength through the cyclone strength adjusting device, and the cyclone strength adjusting device changes the cyclone strength through changing the angle of the inner blade of the inner secondary air cyclone.
6. The biomass fuel slurry steam injection boiler cyclone stable-combustion burner as claimed in claim 1, characterized in that: the opening angle of the secondary air door is controlled by the rotating shaft, so that the air quantity of the secondary air is controlled.
7. The use method of the rotational flow stable combustion burner suitable for the biomass fuel slurry steam injection boiler comprises the following steps:
1. introducing air into a cyclone burner of the biomass fuel slurry steam injection boiler;
2. introducing biomass fuel slurry into a biomass fuel slurry gun sleeve, and simultaneously starting a high-energy igniter sleeve and a gas gun sleeve to burn the biomass fuel slurry;
3. and adjusting the primary air door adjusting device, the secondary air door adjusting device and the rotational flow strength adjusting device according to the combustion condition of the biomass fuel slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810864925.9A CN110793033A (en) | 2018-08-01 | 2018-08-01 | Biomass fuel slurry steam injection boiler rotational flow stable combustion burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810864925.9A CN110793033A (en) | 2018-08-01 | 2018-08-01 | Biomass fuel slurry steam injection boiler rotational flow stable combustion burner |
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| Publication Number | Publication Date |
|---|---|
| CN110793033A true CN110793033A (en) | 2020-02-14 |
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|---|---|---|---|
| CN201810864925.9A Pending CN110793033A (en) | 2018-08-01 | 2018-08-01 | Biomass fuel slurry steam injection boiler rotational flow stable combustion burner |
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Citations (7)
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|---|---|---|---|---|
| CN101907295A (en) * | 2010-08-12 | 2010-12-08 | 浙江百能科技有限公司 | Coal-water slurry low NOx burner and combustion method |
| CN201779650U (en) * | 2010-08-12 | 2011-03-30 | 浙江百能科技有限公司 | Coal-water slurry low NOx burner |
| CN204629471U (en) * | 2015-05-15 | 2015-09-09 | 四川天法科技有限公司 | A kind of water-coal-slurry injection boiler eddy flow low-NOx combustor of top layout |
| CN204629462U (en) * | 2015-05-15 | 2015-09-09 | 四川天法科技有限公司 | A kind of water-coal-slurry low-nitrogen burning injection boiler |
| CN105018161A (en) * | 2015-07-06 | 2015-11-04 | 天津师范大学 | Slurry fuel prepared by baking biomass and application thereof |
| CN106287676A (en) * | 2015-05-15 | 2017-01-04 | 四川天法科技有限公司 | A kind of water-coal-slurry low-nitrogen burning injection boiler and low nitrogen burning mode thereof |
| CN106287691A (en) * | 2015-05-15 | 2017-01-04 | 四川天法科技有限公司 | A kind of water-coal-slurry injection boiler eddy flow low-NOx combustor of top layout |
-
2018
- 2018-08-01 CN CN201810864925.9A patent/CN110793033A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| CN101907295A (en) * | 2010-08-12 | 2010-12-08 | 浙江百能科技有限公司 | Coal-water slurry low NOx burner and combustion method |
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| CN204629462U (en) * | 2015-05-15 | 2015-09-09 | 四川天法科技有限公司 | A kind of water-coal-slurry low-nitrogen burning injection boiler |
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Non-Patent Citations (2)
| Title |
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Application publication date: 20200214 |